South Dakota·SD·FIPS 46027

Clay County

Voted Democratic in 2024 · 5,657 votes cast

About Clay County

Clay County is a county in the U.S. state of South Dakota. As of the 2020 census, the population was 14,967, and was estimated to be 15,245 in 2024. The county seat is Vermillion, which is also home to the University of South Dakota. The county is named for Henry Clay, American statesman, US Senator from Kentucky, and United States Secretary of State in the 19th century. Clay County comprises the Vermillion, SD Micropolitan Statistical Area, which is also included in the Sioux City-Vermillion, Iowa-SD-Nebraska Combined Statistical Area.

2024 Presidential Results

All candidates · Clay County, South Dakota

Kamala D Harris(Democrat)

52.0%2,944

Won by 370 votes

Donald J Trump(Republican)

45.5%2,574

Other(Other)

1.7%97

Chase Oliver(Libertarian)

0.7%42

Margin History

Red = Republican, Blue = Democratic

2024D+6.5

2020D+11.0

2016D+9.8

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Swung Right in 2024

Clay County shifted 4.5 points toward Republicans compared to 2020. Voter turnout decreased by 0.7%.

Clay County — Local Discussion

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What does Clay County really think?

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Election data: MIT Election Data Science Lab, Harvard Dataverse (CC BY 4.0)